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Cleaning treatment method for ammonium chloride production wastewater

A technology for producing wastewater and cleaning treatment, which is applied to chemical instruments and methods, ammonium fluoride, ammonium halide, etc., can solve the problems of high investment cost and high treatment cost, and achieve low investment cost, low wastewater treatment cost, advanced technology and equipment simple effect

Active Publication Date: 2019-04-19
HUBEI TAISHENG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method undergoes membrane treatment and biochemical treatment, which has the disadvantages of high investment cost and high treatment cost.

Method used

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  • Cleaning treatment method for ammonium chloride production wastewater

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Effect test

Embodiment 1

[0027] The production of 120 tons of glycine will produce 1560m³ of methanol mother liquor, of which the process water consumption is 140m³ (the sum of the water used for urotropine and the process water replenishment), and the residual liquor after the rectification of methanol produced by glycine is 230m³ of mother liquor, which are respectively evaporated by two effects After the system, the first-effect evaporation system and the decompression flash system, the temperature of the first-effect heater is controlled to 115°C, the vacuum degree is controlled to -0.06Mpa, the temperature of the first-effect evaporation condensate is 60°C, and the water volume is 80.53m³. The evaporation condensate volume of the two-effect evaporation system and the decompression flash evaporation system is 72.27m³, and the other water volume is 7.2m³ in the ammonium chloride product. The temperature of the first-effect evaporation condensate is 60°C, the water volume is 80.53m³, through vacuum l...

Embodiment 2

[0029] The production of 120 tons of glycine will produce 1560m³ of methanol mother liquor, of which the process water consumption is 140m³ (the sum of the water used for urotropine and the process water replenishment), and the residual liquor after the rectification of methanol produced by glycine is 230m³ of mother liquor, which are respectively evaporated by two effects After the system, the first-effect evaporation system and the decompression flash system, the temperature of the first-effect heater is controlled to 120°C, the vacuum degree is controlled to -0.08Mpa, the temperature of the first-effect evaporation condensate is 65°C, and the water volume is 86.2m³. The evaporation condensate volume of the two-effect evaporation system and the decompression flash evaporation system is 66.6m³, and the other water volume is 7.2m³ in the ammonium chloride product. The temperature of the first-effect evaporation condensate is 65°C, the water volume is 86.2m³, through vacuum low-...

Embodiment 3

[0031] The production of 120 tons of glycine will produce 1560m³ of methanol mother liquor, of which the process water consumption is 140m³ (the sum of the water used for urotropine and the process water replenishment), and the residual liquor after the rectification of methanol produced by glycine is 230m³ of mother liquor, which are respectively evaporated by two effects After the system, the first-effect evaporation system and the decompression flash system, the temperature of the first-effect heater is controlled to 130°C, the vacuum degree is controlled to -0.08Mpa, the temperature of the first-effect evaporation condensate is 75°C, and the water volume is 82.55m³. The evaporation condensate volume of the two-effect evaporation system and the decompression flash evaporation system is 74.85m³, and the other water volume is 7.2m³ in the ammonium chloride product. The temperature of the first-effect evaporation condensate is 55°C, the water volume is 82.55m³, through vacuum l...

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Abstract

The invention relates to a cleaning treatment method for ammonium chloride production wastewater. The method comprises the specific steps that during the separation and purification process of ammonium chloride, residual liquid after rectification of methanol passes through a two-effect evaporation system, a first-effect evaporation system and a decompression flashing system, and a high-ammonia nitrogen and COD content condensed water obtained from the two-effect evaporation system and the decompression flashing system is directly reused in a chloroacetic acid method glycine production process. The water obtained by the first-effect evaporation system is treated by a vacuum low-temperature evaporation system, the obtained low-ammonia nitrogen condensed water is used as a raw material for industrial grade ammonia production, and the residual liquid is directly reused in the chloroacetic acid method glycine production process. The method has small investment in equipment, the evaporationcondensed water treatment is harmless, and the method is energy-saving and environmentally friendly, and is suitable for the chloroacetic acid method glycine production process.

Description

technical field [0001] The invention belongs to the technical field of glycine production by chloroacetic acid method, and in particular relates to a cleaning treatment method for ammonium chloride production wastewater. Background technique [0002] At present, the separation and purification technology of ammonium chloride adopts the invention patent with the publication number CN1033303942A and the name "a method and equipment for recovering ammonium chloride from glycine mother liquor". After the system, one-effect evaporation system and decompression flash system, the ammonium chloride product and the evaporation condensate in the separation process of ammonium chloride are obtained by centrifugation in a centrifuge. Due to the complex composition of ammonium chloride evaporation condensate, high ammonia nitrogen and high COD, there is currently no economical and environmentally friendly treatment method and technology. [0003] The invention patent with the publicatio...

Claims

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Application Information

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IPC IPC(8): C07C227/40C07C229/08C01C1/16C01C1/02
CPCC01C1/022C01C1/162C07C227/40C07C229/08Y02P20/50
Inventor 彭春雪郝晓斌刘三六李跃军马万志覃华龙喻飞张凯
Owner HUBEI TAISHENG CHEM
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